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THHN
Building wire

THHN

Nylon-covered thermoplastic building wire for dry-location raceway wiring.

United StatesLatin America
Sizes, construction & electrical data
THHN / TECHNICAL DATA

Sizes, construction & electrical data

Conductor material
Copper (Cu)
Insulation material
PVC + nylon
Rated voltage
600 V
Maximum conductor temperature
90°C
Jacket / armour
Nylon
Ampacity basis
2023 NEC Table 310.16; applicable correction and termination rules apply
PVC / nylon copper · 14–10 AWG · dual THHN/THWN-2 reference
ConfigurationNominal area / conductormm²Conductor sizeAWG / kcmilStrands per conductorDiameter over bare conductormmInsulation wallmmOuter jacket wallmmOverall dimensions / diametermmCopper weightkg/kmApproximate cable weightkg/kmMinimum bend radiusmmMaximum pulling tensionNDC conductor resistance at 25°CΩ/kmAC resistance at 75°CΩ/kmInductive reactance at 60 HzΩ/kmReference ampacity, 75°C columnAReference ampacity, 90°C columnASelection
14 AWG2.08114Solid1.6260.3810.1272.69217.922.310.16142.38.63210.40.192025
14 AWG2.08114191.8540.3810.1272.8717.923.812.7142.38.63210.40.192025
12 AWG3.30912Solid2.0320.3810.1273.09928.334.210.16231.35.4536.5680.1772530
12 AWG3.30912192.2860.3810.1273.35329.835.712.7231.35.4536.5680.1772530
10 AWG5.26110Solid2.5650.5080.1273.88646.155.115.24369.23.4124.1110.1643540
10 AWG5.26110192.9720.5080.1274.19147.656.617.78369.23.4124.1110.1643540

Typical applications

Commercial feeders, branch circuits and panels.

Design advantages

Compact insulation with a nylon protective layer.

Selection notes

THHN alone does not establish a wet-location rating; verify THWN-2 marking where required.

Standards to review

UL 83; NFPA 70

Related cable families

TGS · VIETNAM

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